4
General information
Optimal sauna climate is achieved only when there is natural ventilation in the steam
room: the inlet of fresh air has to be under the sauna stove near the
fl
oor (marked by letter
A in Figure 1), and the outlet has to be by the ceiling (marked by letter B in Figure 1) as far
as possible from the stone hearth. The purpose of the opening by the ceiling is to remove
moisture from the steam room emitted during sauna procedures. A heated sauna stove
by itself ensures ef
fi
cient air circulation. The stove heats the steam room with convection
streams: cold air is blown in through vents and the air warmed by the heated stove rises
up. A part of the warmed air is pressed into the steam room via vents. This is the typical
way to increase the temperature of the steam room, reaching up to 100 ºC below the ceil-
ing and remaining on the level of 30-40 °C on the
fl
oor. Due to that it is usual that when
temperature is 100 °C below the ceiling of the steam room, the thermometer placed 20-25
cm below the ceiling shows the temperature of only 80 °C. The best steam temperature
range on the upper bath-house platform is between 80 °C to 90 °C.
cm
A
B
Figure 1. Natural ventilation
